Mystery surrounds severed feet in British Columbia Canada
At least five other feet since August have surfaced off Canadian shore
The latest foot showed up in a shoe, authorities say
It could takes weeks or months to use DNA science to identify the body parts
Mystery has garnered attention around the world
(CNN) -- Investigators are pursuing a variety of theories in their quest to unravel the mystery of six human feet that have washed up on the shores of the Canadian province of British Columbia in the last 11 months.
RCMP officers use a container to carry a shoe and foot found on a Canadian beach on Wednesday.
The sixth foot turned up Wednesday -- a right foot in a man's size 10 black Adidas athletic shoe, police said. As in the previous cases, however, immediate answers as to the foot's origin eluded detectives.
"We are exploring the possibility that it could be people who may have drowned," said Annie Linteau, a spokeswoman for the Royal Canadian Mounted Police. "It could be missing fishermen. It could be the remains of people who may have died in a plane crash."
When asked about the suspicion of foul play, Linteau noted that the first four feet contained no tool marks and were therefore deemed not to have been severed. Watch woman describe finding severed foot »
It is too early to say how the foot found Wednesday was separated from a body, and Linteau did not address the question of how the fifth foot came to be detached.
"It is certainly a very unusual situation," she said. "We have to explore all avenues and investigate all theories."
The coroner's office plans to examine DNA from the foot found Wednesday to try to identify the person to whom it belonged, she said. The authorities also are combing through missing persons reports and trying to determine when and where the shoe was manufactured and sold.
Vancouver Sun: Experts mull source of feet on beach
The sixth foot was found by a woman walking on the beach, said Sgt. Mike Tresoor of the Royal Canadian Mounted Police in the town of Campbell River on Vancouver Island, British Columbia.
The foot will be examined by a forensic pathologist, and DNA testing will be requested, said the statement posted on the Royal Canadian Mounted Police Web site.
Sandra Malone, manager of the Thunderbird RV Park and Campground on the Tyee Spit, said a woman came in about 10:30 a.m. and asked her to call police, saying she had found the shoe with the foot inside it.
While waiting for police, Malone said, she walked to the beach with the woman and saw it for herself.
"You could see the foot that's inside the running shoe," she said. "The leg bones were coming out of the running shoe about 3 to 4 inches. There were no tissues or anything attached."
She said seaweed was wrapped around the top of the running shoe, making it hard to tell whether any tissue was inside the shoe. But she said the foot appeared to have been deliberately severed, as the bones "had been cut clean across."
The foot was the sixth discovered on shorelines in the area since August, according to local police and media reports. Another foot -- a left foot still in a shoe -- was found Monday on the shore of Westham Island, south of Vancouver. Police said it was taken to a coroner for DNA testing.
"Our first step is to establish identity," said Constable Sharlene Brooks of the Delta Police Department in British Columbia. "It is a little mysterious, but we don't know if it is linked to others."
The Vancouver Sun newspaper said the first four feet found in the area were all right feet, making the foot found Monday the only left foot.
Experts told The Sun there could be explanations that did not suggest foul play.
Ian Buckingham, a retired coroner, told the newspaper the ankle joint can come apart easily if a body is decomposing at sea.
Curtis Ebbesmeyer, an expert on ocean currents, told The Sun a foot wearing a buoyant athletic shoe could float as far as 1,000 miles.
Although the gruesome finds have drawn international attention, police said it may take some time to unravel the mystery.
"We suffer from the 'CSI' effect: People think this can happen very quickly," Brooks said. "It could take weeks or months. And even if we get a DNA sample, we need a sample to match it with."
The mystery has caused a stir and led to many rumors, locals say. One newspaper has began investigating a rash of young men who have gone missing in the area.
Some have wondered whether the feet could belong to five men who were in a plane that crashed three years ago in the waterway where the feet were found.
Some of those men's relatives were at the Campbell River site on Wednesday.
"It's a constant reminder every time, from the time the first foot washed up," said Kirsten Stevens, whose husband, Dave, died in the crash. Although her husband's body was located, Stevens said, the other men's relatives never recovered their loved ones' remains.
"It reopens the wound every single time," she said.